Home / 865,459,620.21-1,298,199,402.96-312,804,020.37

Finding the Fourth Proportional to 865,459,620.21, 1,298,199,402.96 and 312,804,020.37

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Solution

The fourth proportional to 865,459,620.21, 1,298,199,402.96 and 312,804,020.37 is: 469,209,634.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,459,620.21 : 1,298,199,402.96 = 312,804,020.37 : x
  2. Step 2: Convert to fraction form
    865,459,620.21/1,298,199,402.96 = 312,804,020.37/x
  3. Step 3: Cross multiply
    865,459,620.21x = 1,298,199,402.96 × 312,804,020.37
  4. Step 4: Simplify right side
    865,459,620.21x = 406,081,992,487,821,696
  5. Step 5: Solve for x
    x = 406,081,992,487,821,696/865,459,620.21
  6. Step 6: Final answer
    x = 469,209,634.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.